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FR2387546A1 - DIGITAL PHASE MODULATOR IN SHARED RING - Google Patents

DIGITAL PHASE MODULATOR IN SHARED RING

Info

Publication number
FR2387546A1
FR2387546A1 FR7811132A FR7811132A FR2387546A1 FR 2387546 A1 FR2387546 A1 FR 2387546A1 FR 7811132 A FR7811132 A FR 7811132A FR 7811132 A FR7811132 A FR 7811132A FR 2387546 A1 FR2387546 A1 FR 2387546A1
Authority
FR
France
Prior art keywords
diodes
digital phase
phase modulator
shared
ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR7811132A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of FR2387546A1 publication Critical patent/FR2387546A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
    • H04L27/2035—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using a single or unspecified number of carriers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/52—Modulators in which carrier or one sideband is wholly or partially suppressed
    • H03C1/54—Balanced modulators, e.g. bridge type, ring type or double balanced type
    • H03C1/56—Balanced modulators, e.g. bridge type, ring type or double balanced type comprising variable two-pole elements only
    • H03C1/58—Balanced modulators, e.g. bridge type, ring type or double balanced type comprising variable two-pole elements only comprising diodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Amplitude Modulation (AREA)

Abstract

La présente invention concerne un modulateur de phase numérique en anneau partagé. Un modulateur à iodes en anneau partagé couplé par un transformateur pour la modulation de phase numerique d'un flux de données selon la présente invention, comprend des paires de diodes D1, D2 et D3, D4. Les diodes D2, D4 sont polarisées en inverse quand les diodes D1, D3 sont polarisées en direct La polarisation en inverse est réglée par un potentiomètre P1. Ceci permet d'assurer une attenuation supplémentaire dans les lobes latéraux repliés apparaissant dans la bande passante. L'atténuation supplémentaire provient d'une fonction d'atténuation cosinusoïdale qui dépend de la durée de commutation des diodes et ainsi de la tension de la polarisation qui leur est appliquée Application aux modulateurs à très large bande passante.The present invention relates to a shared ring digital phase modulator. A shared-ring iodine modulator coupled by a transformer for digital phase modulation of a data stream according to the present invention, comprises pairs of diodes D1, D2 and D3, D4. Diodes D2, D4 are reverse biased when diodes D1, D3 are forward biased. Reverse bias is adjusted by a potentiometer P1. This makes it possible to provide additional attenuation in the folded side lobes appearing in the passband. The additional attenuation comes from a cosine attenuation function which depends on the switching time of the diodes and thus on the voltage of the bias applied to them. Application to very wide bandwidth modulators.

FR7811132A 1977-04-15 1978-04-14 DIGITAL PHASE MODULATOR IN SHARED RING Withdrawn FR2387546A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA276,297A CA1073061A (en) 1977-04-15 1977-04-15 Split-ring digital phase modulator

Publications (1)

Publication Number Publication Date
FR2387546A1 true FR2387546A1 (en) 1978-11-10

Family

ID=4108403

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7811132A Withdrawn FR2387546A1 (en) 1977-04-15 1978-04-14 DIGITAL PHASE MODULATOR IN SHARED RING

Country Status (6)

Country Link
US (1) US4088967A (en)
JP (1) JPS53128966A (en)
CA (1) CA1073061A (en)
DE (1) DE2816330A1 (en)
FR (1) FR2387546A1 (en)
GB (1) GB1581303A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6115863U (en) * 1984-06-29 1986-01-29 日本電気ホームエレクトロニクス株式会社 2-phase differential PSK modulation circuit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB703928A (en) * 1951-02-01 1954-02-10 Smith & Sons Ltd S Improvements in modulating or demodulating devices
US3281694A (en) * 1962-01-02 1966-10-25 British Telecomm Res Ltd Carrier current signalling system using quaternary modulation
DE1963051A1 (en) * 1968-12-17 1970-12-10 Sanders Associates Inc Frequency converter circuit
US3624559A (en) * 1970-01-02 1971-11-30 Rca Corp Phase or frequency modulator using pin diodes
DE2057634A1 (en) * 1970-11-24 1972-05-31 Schlumberger Overseas Mixing circuit for generating the sum or difference frequency of two input frequencies

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE534076A (en) * 1953-12-14
US3029399A (en) * 1959-12-29 1962-04-10 Gen Electric Modulator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB703928A (en) * 1951-02-01 1954-02-10 Smith & Sons Ltd S Improvements in modulating or demodulating devices
US3281694A (en) * 1962-01-02 1966-10-25 British Telecomm Res Ltd Carrier current signalling system using quaternary modulation
DE1963051A1 (en) * 1968-12-17 1970-12-10 Sanders Associates Inc Frequency converter circuit
US3624559A (en) * 1970-01-02 1971-11-30 Rca Corp Phase or frequency modulator using pin diodes
DE2057634A1 (en) * 1970-11-24 1972-05-31 Schlumberger Overseas Mixing circuit for generating the sum or difference frequency of two input frequencies

Also Published As

Publication number Publication date
GB1581303A (en) 1980-12-10
DE2816330A1 (en) 1978-10-19
US4088967A (en) 1978-05-09
CA1073061A (en) 1980-03-04
JPS53128966A (en) 1978-11-10

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Legal Events

Date Code Title Description
ST Notification of lapse